The key distinction between SPA3 and previous platforms lies in engineering philosophy. Earlier Volvo electric vehicles, such as the EX90 and ES90, utilize SPA2—an architecture derived from platforms that originally accommodated gasoline engines, transmissions and exhaust systems. SPA3 optimizes every element specifically for electric propulsion.

The primary advantage stems from its singular focus. When engineers design a platform that must accommodate both gasoline and electric power trains, they make trade-offs. Battery placement works around components like transmission tunnels or fuel tank locations.

Floor structures account for exhaust routing. Suspension mounting points consider engine weight distribution. These compromises add weight, consume space, and limit optimization potential. SPA3 removes these constraints entirely.

Using a “clean sheet approach” to EVs, the new platform integrates the battery as a structural component from the beginning, using cell-to-body technology where individual battery cells bond directly to the floor structure. This approach eliminates the need for separate battery enclosures and allows engineers to reduce material thickness in surrounding structures, because the battery assembly contributes to chassis rigidity.

The result is measurable weight reduction. Eliminating redundant protective structures, removing components required for gasoline powertrains, and optimizing material use throughout the platform creates savings that directly improve range. 

SPA3 establishes standardized mounting points, electrical architectures and structural interfaces that remain consistent across different vehicles. When Volvo develops a compact crossover, a mid-size sedan or a larger SUV on SPA3, engineers work with known parameters rather than starting from scratch.

The flexible platform also supports different battery chemistries, motor configurations and power electronics without requiring a complete redesign. When battery energy density improves or new motor technology emerges, SPA3 can integrate these advances across the product line.

Gigacasting (Volvo refers to the technology as “megacasting”) also plays a strategic role in the SPA3 platform. The rear underbody structure of the EX60 features a large, single casting that eliminates hundreds of stamped and welded parts. A targeted approach to material distribution reduces weight while improving strength.

Eliminating overlapping material at weld joints removes redundant metal.  Engineers can also optimize material thickness throughout the casting based on structural load requirements—using more material where needed and less where loads are lighter.

High-pressure aluminum injection reduces complexity, improves dimensional stability, and decreases assembly time.

Gigacasting creates a single-piece rear underbody that replaces more than 100 parts and accelerates production to a 120-second cycle time.

Traditional body construction involves stamping individual panels, welding them together in specific sequences, and finishing the assembly with corrosion protection and paint. Each welding operation introduces potential variation in tolerances and structural integrity.

Gigacasting eliminates these variables. A single die creates a precisely dimensioned component with consistent material properties throughout. The reduction in weld points decreases potential failure modes and improves crash performance predictability. Fewer parts mean fewer quality control checkpoints and faster production cycles.